How to know to there is ascarid inside abdomen?

怎样知道肚子里面有蛔虫?

Poultry dung is deodorized by a biological bacterium technology to kill the ascarid eggs in the poultry dung, decompose organic matters, and degrade heavy metals to volatilize.

用生物菌技术将鸡粪除臭，杀死其中的蛔虫卵，并腐熟有机质，降解重金属使其挥发。